IIIT Hyderabad Publications
Non-linear numerical modeling of tectonic plate for understanding crustal deformation and stress accumulation at plate junctions
Author: Venkata Dilip Kumar Pasupuleti
Report no: IIIT/TH/2016/11
Advisor:Pradeep Kumar Ramancharla
Earthquakes and crustal deformations are well observed and recorded all over the world. Geological, geodesy and geodetics studies have been on pivotal to understand crustal deformations and to pridict earthquakes. Many plate tectonic models have been proposed describing interaction types. Experimental, analytical numerical models are being developed to understand the whole tectonic process. Indian tectonic plate is experiencing one of the most dramatic crustal deformations by forming Himalayas due to collision between Indian plate and Eurasian plate. The convergence rate is making the whole region including peninsular India seismically very active leading to minor to great earthquakes. Indian tectonic plate boundary is undergoing continental-continental plate collision in the northern part, oceanic-continental plates subduction in the eastern part, oceanic-oceanic plates divergence in the southern part and oceanic-continental plates transform in the western part. Over all, all kinds of plates interactions and their aects are seen in and around Indian tectonic plate. With increasing computing power over the last few decades several computer models have been developed, at the same time many numerical methods have also been under enhancements. Out of many numerical methods, nite element method is used widely for all kinds of elds and applications because of its simplicity in understanding and coding. ABAQUS is nite element based commercially available software which has the power of modeling and simulating all kinds of complex physical problems with material (elastic, visco-elastic), geometry and boundary non-linearity (friction, contact analysis). The main objectives of this research is to simulate and understand the crustal deformations in general and apply the same to Indian tectonic plate and its boundaries. Starting with interaction between Indian and Eurasian plates, undersatnd subduction process for generic scenerio for arc-subduction geometry and to claculate the energy released to during Assam great earthquake (1897) using various nite element based models.
Full thesis: pdf
Centre for Earthquake Engineering
Copyright © 2009 - IIIT Hyderabad. All Rights Reserved.